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See also: seacht-


Irish cardinal numbers
 <  6 7 8  > 
    Cardinal : seacht
    Ordinal : seachtú
    Personal : mórsheisear, seachtar


From Old Irish secht, from Proto-Celtic *sextam, from Proto-Indo-European *septḿ̥.



seacht (triggers eclipsis)

  1. seven

Usage notes[edit]

  • May be used with nouns in both the singular and plural; the singular is more common in general, but the plural must be used with units of measurement and the like. Triggers eclipsis:
  • seacht gcatseven cats
  • seacht dtroitheseven feet
  • seacht n-éinseven birds
  • When used with the definite article, the definite article is always in the plural. When used with adjectives, the adjective is also in the plural and is always lenited after nouns in the singular; after nouns in the plural, the adjective only lenites after slender consonants:
  • seacht gcapall bhánaseven white horses
  • na seacht n-eaglais mhórathe seven big churches
  • seacht gcapaill bhánaseven white horses
  • na seacht n-eaglaisí mórathe seven big churches

Derived terms[edit]


Irish mutation
Radical Lenition Eclipsis
seacht sheacht
after an, tseacht
not applicable
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

Further reading[edit]